Metal-working machine



s T NELSON .METAL WORKING MACHINE Al -Filed Jun 18. 1921 Nov. 22, 1927.

Patented New; 22, 1927.

'SV-EN T. nazsen, OF iitic i ennfcii'zq cciw ie n i, hjcdaE aA rmN or; J/IASSACHUSETTSQ' innmitli, A SSIGhIQIii Te SULLI vgmmhcmn m 1" METAL-WORKING- MACHINE. I

iii neation filed June is,

My invention relates to metal Working eningiof mining machine-bitsy. V i An object. of my invention is. to provide an improved metal Werkingmachine; Another object oi my invention is to prcvide an improved machine for: sharpening unining machine-bits. Other-objects of in vention will appear in the courseotnthel following specification and appendedcla ims." In the accompanying drawing-sf]: have; shown 1'0? purposes of illustration "one emv hodiment Which my inventi on may: assume in practice. 111 these ClliL'WiIlgSf- I I; Fig. 1 is a side elevatic' with parts broken away, of hit sharpening machine embodying the illustrativef0rm 0fmy inf vention. 4

Fig. 2' is anenlarged VlBWf partially in elevation, and in sec'tionjthreugh-the centers of the dies of my improved mechanism. Fig, 3 is a transversesection on the line 8 3 ct'Fig. 2, parts being shown-in elevation. I e For purposesefillustiatiOdI have shown my bit sharpening mechanism operated by a moving ram ofthe type whichfliscemmon in shape-rs. In this mechanism; the ram 1 is caused to reciprocate in gui des 2-by means of an oscillating arm 3 pivoted "at 4 and caused to oscillate by an'adjustahle crank pin 5, the adjustment being made by means of a mechanism 6 of well-known form which as disclosedis cit the well-known lvhitworth quick return motien 'mechanism. Carried by the ram 1 is[a"r0ller' die? Which is formed in its periphery with ing machines of a type "suited forthe sharp-L:

groove 8 of such shape thatits trace; dfa plane cutting the axis of the roller the forward Or. right hand j rolling'acticn is repeated.

- e i the bit will he Withdrawn and I in T the 1921.! Serial n6. 78,498. 7 I

V 9 is regulated by at-sliding Wedge 14 which machines and particularly to metah'werh is adjustahlehy means eta stationary screw 15 and nut, 16, the nut being rigidly secured 'te-the Wedge member 145' and the screw-being .IQtttl3Ed-vbyi awhand Wheel 1-17. Thea'but ment member 10 has sloping sides andja' ts ss narrow topor upper end A transversevsec fm tion through the abutment memberlO is the vsameas thercontour ofthegmeve 8 and ac cordingly as the ram l reciprocates, the i? abutment member 10 willhe overrun bythe roller 7 and the groove-8 Will pass over the' abutment niemher-- 10, engaging both {the lateralr'surt'acesand the top 01- upper end fl' ere of LI. 1

vFr mthe i'bi'egoing description the mode cperat'ionof my improved mechanism will be readily apparent. A bit" heated to the proper temperature will he drooped intcthe shit-12 andthe WBClgE 14 adjusted by means ot' t-h'e screw 15 and nut 16 so that the hit protrudes slightly (above the upper side of the-abutment member 10. The ram 1 Will then hecaused to reciprocat andupon its stroke '(see Fig; 1) will force 'Over the metalfof the heated bit against the" surface '11 bit into approximately proper contour. In

tlie event tliat the bit did not protrude a sufficient amount from the slot 12 to filleut the outer endof the hit to the desired 3 portions; the Wedge 14 will be again ad- 1 justed so that the heated blank or hit is PTO- forcedlup slightly further whereupon the hen the sharpening Ofthe-bithas progressed to Sacha point that the bllZ lS Of the proper contour and iccmp'letelyfills up the bath (if-the roller andthe surface 11,

will be ready fortempering.' The fact that the socket 12 is disposed atsome such angle as shoivn is of great importance in the production of propel hits. This angle will he so selected that the angle between the shank of the hit and avertical line during sharpening will be greater thant-h-e angle between the shank and a line perpendicularto the instantane 'ous path ofcmovement of the bit during" cuttingJIByj virtue of this arrangement,

whenthe shank of the sharpened bit is secured in a link of a cutter chain the'frciit surface of the cutting end will be Wider than thefstock which supports it, and so there 'willbe no Wedgmg at the sides of the and will form the space between bit and no friction, but instead the cutting.

by the use of the quick returnmotion mechanism which will givea greater numberof forging strokes for a unit of time" than. if

theram was reciprocated at a uniform rate ofspeed in each direction. 1 The, ram on may ' ends on tools comprising the forging stroke need only travel at its normalforging speed while the ram, speed onfthe I return stroke. would be greater 4 to thereby give the greater numberof strokes per unit of time. A further advantage derived is that the forging rollerwill be more apt to befgiven a spinning action onits.

rearward stroke due to the quick return and inthatiway cause a new portion of the forging surface of the roller die'to be resented to the biton eachsucceeding stro e. This notonly insures more even wear of} the walls ofthe roller die groove, but also in case of an irregularly worn roller, or foreign material beingearried onthe walls of the groove, the worn portion or foreign matter will not on each succeeding stroke be brought in con tact with the. identical portion of the surface of the bit as it was previouslyin contact with for ,the, spinning action of the roller will present as before stated, a{new ortion of the forging surface. Thusithe it portion will be more perfectly formed, even in spite of an irregularly wornrollerv or the presence of foreign matter;

While I have inthis application specifi cally described one form which my invention assume in practice, it will be understood that this form of the same is for purposes of illustration and that the invention bemodified and embodied in various other forms without departing from its spirit or the scope of the appended claims a e What I claim asinew and-desire tosecure by Letters Patent is: p

1. In a forging machine for forming cutting ends ontools, a rotatable forming die provided'with a peripheral groove of uniform cross section, an abutment against which the blank lies during forging, and means for causing relative movement between said rotatable die and said abutment in such manner that during atleast, a part of said movement the abutment is within the groove.

2. A forgingniachine for forming cutting die means for rier may be forming the lateral surfaces of a tool, a die which interfits with said first mentioned die means, means for supporting a tool for engagement by said dies during the forging operation, and means for causing relative movement between the dies.

3. In a bit forming device, a blank carrier member, a the associated therewith forming an abutment against which a blank may rest, a. rotatable forming die having a peripheral groove of uniform cross section throughout its length but of; a greater width at the periphery of the die than the. bottom of the groove, said abutment substantially i fitting said groove,

relative bodily movement between said car:

and means for causing no rier member and said rotatable forming die.

4:. Ina bit forming device, a blank car-. rier member including a die forming an, abutmentagainst which a blank may rest, a rotatable forming die having a peripheral, groove of a greater width at the periphery of the die than the bottom of thegroove,

said i abutment substantially fitting ,said groove, and means for causing relative bodily movement between said carrier member and said rotatable forming die. I

5. In a bit forming device, a blank carrier member having a die surface formed thereon, a freely rotatable forming die provided with a peripheral groove to form the cutting portion of said bit, and means for effecting relative movement of said member and said die whereby a blank carried by said carrier may be subjected to the action of W said die.

6. In a bit formin device, a blank carrier member having a die formed thereon, a grooved rotatable formin die adapted to cooperate therewith, said first mentioned die conforming in transverse section to the shape of said groove, and means for causing relative movement of said member and said rotatable die whereby a blank carried by said carrier ma be subjected to the combined action of said dies. c

7. In a bi forming device, a blank'carrier member having a die disposed thereon and provided with a blank receiving slot, a rotatable forming dieadapted to cooperatetherewith, and means cooperating with said member to prevent the insertion of a blank in said slotbeyond a predetermined point and to vary the depthto which said blank can be inserted therein, said means maintaining its cooperating position during operation of the forming die.

8. In a bit forming device, a blank carrier member having a raised die associated therewith and provided with an upper endand side surfaces, means comprising arotatablc forming (lie, and means for causing relative movement between said member and rotatable die whereby a blank carried by saidcar subjected to the action of said llil rill

rotatable die, the movement of said rotataporting means including means for adjust ing the blank relativeyto the path of reciprocation of said die, and 'an upstanding abutment adapted to shape the front face of the bit by resisting the flowiof metal during forging.

10. A forging machine for forming cut ting ends on tools comprising a die against which the front face of the tool is to be formed and freely rotatable diemeans for forming the other bounding surfaces of the cutting end by directly engaging the same, and means for causing relative movement between said die and die means to effect forming of said, cutting ends.

11. A forging machine for forming cutting ends on tools comprising a die to support the front face ofthe tool and die means for forming the lateral surfaces thereof with which said first mentioned dieinter-fits, and means for causing relative movement between said die and die means to effect forming of a cutting end. i

12. A forging machine for forming cutting ends on tools comprising a die for supporting the cuttingend of the tool and die means including surfaces operative "to form the lateral surfaces ofthe cutting end, and means for effecting rectilinear relative movement between said die and die means in which the path of relative movement during engagement of the die surfaces with the cutting end intersects at an angle the axis of the shank of the tool extended.

13. In a bitforming device, a stationary blank carrier member, a rotary dieand a carrier member therefor reciprocable relative to said blank carrier member, and means as sociated with said blank carrier member for the reception of a bit blank and for its adjustment relative to the path of movement of saidrotary die carrier member including a wedge member disposed in the vertical plane in which the relativemovement between said members takes place.

'14. In a bit forming device, a stationary blank carrier member, a rotary die and a carrier member therefor reciprocable rcla tive to said blank carrier member, and means associated with said blank carrier member for the reception of the blank and for its adjustment relative to the path of movement of said rotary die carrier member including a wedge member reciprocable in a groove in said blank carriermember.

15. In a bit forming mechanism, a blank carrying member including adie adapted to support and form the point of av bit,a freely rotating grooved die adapted to cooperate therewith to form the sides of the bit by directly engaging the same, and means for moving said last mentioned die towards and pastsaid other die in a direction so that it overrruns said point last.

. 16. In a bit forming mechanism, a blank carrying member including a die adapted'to support and form the rotating grooved therewith to form the sides of the bit porion' by directly engaging the same, and means for moving said last mentioned die to-.

wards and past said other diein a direction; so thatrt overrruns said point last, said die moving means including a pivoted support for said second mentioneddie permitting the same to yield if said die engages said blank when movingin the opposite direction to that specified. r

17. In a bit forming'device, a'blank carrier having a blank receiving slot therein, and a member disposed below said slot and movable transversely of the 'shank of the blank, said member having an inclined face against which the shank end of the blank abuts and on which it rests by gravity.

18. In a bit forming device, a blank car rier having a blank receiving slot therein, and a member disposed below said slot and having an inclined face againstwhich the shank end of the blank abuts, said member being movable transversely of the shank axis to varythe depth to which a blank can be inserted in said slot. i 19. A forging machine for forming the cutting ends of tools comprising relatively movable blank supporting and die forming members, the latter being operative to form the lateral surfaces of said cutting ends by direct engagement therewith, and means for feeding the tool.

20. A forging machine for forming the cutting ends of tools comprising relatively movable blank supporting and die forming members, said members cooperating to form all of the bounding surfaces of the cutting end of a tool, and theformer including an abutment against whichthe cutting end of the tool rests while the latter has portions providing forming surfaces movable during engagement with the tool and is operative point of a bit, a freely die adapted to cooperate:

c the instant of disengagement with the which the bit theflateral surfaces of said cutting ends'by direct engagement therewith of the movable portion ofthe die members, and means whereby. the path of relative movement at blank is at an acute angle to the direction of the longitudinal dimension of the blank as supported in said blank supporting member.

23. 'A machine for forming the cutting ends of bits comprising a freely rotatable forming die provided with a peripheral groove of uniform tapering cross section to form the lateral sides of a bit, a clapper box to.rotatably support said die, a carrier in blank to be formed is supported, and means for moving the forming dierelative to the carrier.

24.118. bit forming machine comprising a bit carrier having a blank receiving slot therein, means disposed below said slot and movable transversely thereof for feeding said blank during forging thereof, and screw operated. means for adjusting said latter means,

25. As an article' of manufacture, a die for) forming the cutting portion of a bit comprising a base portion, a. die portion proper projectingtherefrom and which has a transverse section conforming substantially to that of the cutting portion of a bit formed thereon. Y e

26. As an article of manufacture, a bit forming die comprising a base adapted to bepositioned in a suitable supporting member, said die having a die portion proper projecting therefrom and whose cross section is substantially the same as that of the cutting portionof a bit formed thereon, said die portion also having an inclined surface againstavhicli thecutting face of a bit formed thereon rests during forming.

27. As an article of manufacture, a bit forming die comprising supporting and raised die portions, said latter portion being adapted to cooperate with a suitable die forming roller toformthe cutting end of a bit. I

.28. As an article of manufacture, a bit forming die comprising a base, a die portion proper projecting therefrom and whose transverse section is substantially equal to the transverse section of the cutting portioniof a bit formed thereon, said die portion having uniform sides along its longitudinal axis, anda plurality of angularly disposed surfaces, one of which is formed on the base and the other on the die portion.

29. 'A bit forming device comprising a member having a recess therein disposed at an angle to the vertical, a die carried by said member having-a die portion proper projecting therefrom, said portion having a face inclined to the axis of said slot and having its transverse section substantially identical tolthe transverse section of the cutting portion of the bit formed thereon, and a grooved roller cooperating with said die, the sides of said groove having substantially the same conformation as the sides of saidvdie.

30. A bit forming device comprising a member having a recess therein disposed at an angle to the vertical, a die carried by said member having a die portion proper projecting therefrom, said portion having a face inclined to the axis of said slot and having its transverse section substantially identical to the transverse section of the cutting portion of the bit formed thereon, a grooved roller cooperating with said die, the sides of said groove having substantially the same conformation as the sides of said die, and means disposed below said slot to force a bit-blank disposed therein outwardly therefrom.

31. A bit forming device comprising a roller die having a uniform groove therein around the periphery thereof, means for moving said roller die in-a predetermined path, a member having a bit receiving slot therein disposed at an angle to the path of said roller, and a stationary die associated with said member and having a die portion proper projecting from said member and whose cross section is substantially the same as the cross sectionof said groove.

32. A bit forming device comprising a roller die having a uniform groove therein around the periphery thereof, means for moving said roller die in apredetermined path, a member having a bit receiving slot therein disposed at an angle to the path of said roller, and a stationary die carried by said member and having a die portion proper projecting upwardly from said member and whose cross section is substantially the same as the cross section of said groove, said die portion proper having a face against which a bit rests during forming thereon, said die face being disposed at an angle to the longitudinal axis of said slot.

In a forging machine, a blank support, a die member associated therewith against which rests the face of the cutting portion of a bit to be forged, a forging die having means providing a groove the walls of which directly engage the lateral surfaces of said bit cutting portion during forging thereof, and means for eii'ecting relative reci )rocatory movement between said face and die.

3i. A forging machine comprising a blank support. a die against which rests the face of the cutting portion of a bit during forging thereof. a forg'ngdic having means providing agroove the walls of which directly engage and conform to the lateral surfaces of said cutting portion during forging thereof. and means for effecting relative reciprocatory movement between said supportand die, the grooved portion-of said die being stationary adapted to pass beyond the surface against which the bit face rests. v

85. A cutter bit forging machine compr1sing a roller die, a cutter-bit support, and means for causing relative reciprocable lIlOVGlllGIlt therebetween including mechanism operative on movement of-one element thereof at a predetermined constant rate to effect the relative reciproca'ble movement aforesaid in one direction at a greater rate than that in the other direction.

86. A forging machine comprising a die, a

cutter bit support, and means for moving said die including mechanism operative automatically on the effecting of n10ve-- for moving the samein different time periods through opposite movements of a single cycle of operation including means for posi-- tively moving the same in opposite directions including mechanism having an actu ating element whose rate of movement is constant throughout the cycle.

39. In a cutterbit sharpening machine, a bit blank holder, a die movable relative to said holder to forge the cutting portion of a bit, and means for supporting said die comment rotatable prising a pivoted clapper box.

40. In a forging machine, a die comprising a roller having a groove on theperiphery thereof, a raised die cooperating with the groove in said roller die, and means for effecting relative movement between said dies.

41. In a forging machine, a grooved forming die movable in a predetermined fixed path throughout all forging operations, a stationary raised die formed to extend within the groove in said movabl forming die and adapted to act asa rest against which a portionof the blank to be formed is held, and

means for effecting movement of said movable formmg die relative to sald stationary die,

the portion of the blank member .member pivotally connected to hit forging machine compris-.

die reciprocating mechanism operamovement of said rotatable and having a surface 42. In a forging machine,-a groove d roller die member movable in a predetermined fixed path throughout all forging, operations, a complemental stationary die formed to extend into the groove in said roller die and adapted to form a rest to be formed is held, nndmeans for effecting movement of said die relative to saidstationary die.

43. In a forging machine, a crosshead movable in a predetermined fixed path throughout all forging operations, a said cross a grooved roller die carried head member,

member, a complemental staby said pivoted against which tionary die member, and means for effecting reciprocation of said crossh'ead member.

44. I11 a forging machine, a stationary blank carrier'member, a rotatable forging die member adapted to shape the sides of the blank movable in a throughout its entire forging operation, a

die having outline complemental to the she e of the rotatable die member carried by said carrier member, and

die.

45. In a forging machine, a forming die having a groove therein, a complemental raised die formed to extend Within the groove in said forming die, and adapted substantially completely to fill the section of the groove occupied thereby ina predetermined relative position of said dies, and means for effecting relative movement between said dies.

46. As an article ina forging machine, in which cutting tools are formed by the coaction of cooperating relation takes place during forging operation, a die ele during the forging operation and having a forging groove of substantially uniform cross sectionextending completely around, its periphery,said groove having a cross section which corresponds to the shape of the die with which said die element is adapted to interfit;

an interfitting the course ofa fixed linear path of manufacture, for use" means for effecting "dies between which relative movement and V As an article of manufacture,-a die for i use in comprising a portion having a transverse sectionconforming substantially to that of i the cutting portion of a bit formed thereon and forming one surface of the bit forged. In testimony whereof I affix my signature.

SVEN T. NELSON;

forming the cutting portion of a bituo providing a support for 

